As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED WHILE TAXIING AFTER LANDING ENGINE SHUT DOWN UNCOMMANDED. ENGINE FAILED TO START AFTER MULTIPLE ATTEMPTS. UPON TROUBLESHOOTING FOUND THAT NEITHER LH OR RH MAGNETO PRODUCED SPARK. REMOVED BOTH MAGNETOS AND FOUND LOOSE CONNECTIONS ON CONDENSOR TO POINTS SPADE CONNECTOR. WIRE HAD COME LOOSE/OFF. THIS CONDITION WAS FOUND ON BOTH MAGNETOS.